loop0: detected capacity change from 0 to 32768 ================================================================== BUG: KASAN: slab-out-of-bounds in bch2_sb_clean_to_text+0x139/0x1d0 fs/bcachefs/sb-clean.c:307 Read of size 1 at addr ffff888179486004 by task syz-executor.0/2363 CPU: 0 PID: 2363 Comm: syz-executor.0 Not tainted 6.6.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xf8/0x260 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0x167/0x540 mm/kasan/report.c:475 kasan_report+0x175/0x1b0 mm/kasan/report.c:588 bch2_sb_clean_to_text+0x139/0x1d0 fs/bcachefs/sb-clean.c:307 bch2_sb_field_to_text+0x162/0x200 fs/bcachefs/super-io.c:1097 bch2_sb_field_validate+0x1b5/0x270 fs/bcachefs/super-io.c:1071 bch2_sb_validate+0x73d/0x910 fs/bcachefs/super-io.c:475 bch2_read_super+0x7be/0x1350 fs/bcachefs/super-io.c:782 bch2_fs_open+0x1c5/0x2bb0 fs/bcachefs/super.c:1897 bch2_mount+0x564/0x1120 fs/bcachefs/fs.c:1829 legacy_get_tree+0xe9/0x180 fs/fs_context.c:638 vfs_get_tree+0x82/0x190 fs/super.c:1750 do_new_mount+0x1e5/0x930 fs/namespace.c:3335 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount+0x242/0x2e0 fs/namespace.c:3861 do_syscall_64+0x46/0xc0 entry_SYSCALL_64_after_hwframe+0x6f/0xd9 RIP: 0033:0x7fd98087f3aa Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd98155aef8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fd98155af80 RCX: 00007fd98087f3aa RDX: 0000000020011a00 RSI: 0000000020011a40 RDI: 00007fd98155af40 RBP: 0000000020011a00 R08: 00007fd98155af80 R09: 0000000003004000 R10: 0000000003004000 R11: 0000000000000246 R12: 0000000020011a40 R13: 00007fd98155af40 R14: 0000000000011a04 R15: 0000000020000040 Allocated by task 2363: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x80 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:198 [inline] __do_kmalloc_node mm/slab_common.c:1023 [inline] __kmalloc_node_track_caller+0xab/0x1d0 mm/slab_common.c:1043 __do_krealloc mm/slab_common.c:1411 [inline] krealloc+0x7d/0x120 mm/slab_common.c:1444 bch2_sb_realloc+0x1bd/0x370 fs/bcachefs/super-io.c:204 read_one_super+0x6c2/0xd90 fs/bcachefs/super-io.c:633 bch2_read_super+0x625/0x1350 fs/bcachefs/super-io.c:715 bch2_fs_open+0x1c5/0x2bb0 fs/bcachefs/super.c:1897 bch2_mount+0x564/0x1120 fs/bcachefs/fs.c:1829 legacy_get_tree+0xe9/0x180 fs/fs_context.c:638 vfs_get_tree+0x82/0x190 fs/super.c:1750 do_new_mount+0x1e5/0x930 fs/namespace.c:3335 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount+0x242/0x2e0 fs/namespace.c:3861 do_syscall_64+0x46/0xc0 entry_SYSCALL_64_after_hwframe+0x6f/0xd9 The buggy address belongs to the object at ffff888179484000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 4 bytes to the right of allocated 8192-byte region [ffff888179484000, ffff888179486000) The buggy address belongs to the physical page: page:ffffea0005e52000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x179480 head:ffffea0005e52000 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0x100000000000840(slab|head|node=0|zone=2) page_type: 0xffffffff() raw: 0100000000000840 ffff888100042280 ffffea0005e4b200 0000000000000003 raw: 0000000000000000 0000000080020002 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1442, tgid 1442 (sh), ts 23922127046, free_ts 23894025301 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x10f/0x130 mm/page_alloc.c:1536 prep_new_page mm/page_alloc.c:1543 [inline] get_page_from_freelist+0x3baa/0x3db0 mm/page_alloc.c:3170 __alloc_pages+0x255/0x650 mm/page_alloc.c:4426 alloc_slab_page+0x6a/0x170 mm/slub.c:1870 allocate_slab mm/slub.c:2017 [inline] new_slab+0x70/0x270 mm/slub.c:2070 ___slab_alloc+0x834/0xd60 mm/slub.c:3223 __slab_alloc mm/slub.c:3322 [inline] __slab_alloc_node mm/slub.c:3375 [inline] slab_alloc_node mm/slub.c:3468 [inline] __kmem_cache_alloc_node+0x1aa/0x260 mm/slub.c:3517 kmalloc_trace+0x2a/0xc0 mm/slab_common.c:1114 kmalloc include/linux/slab.h:599 [inline] kzalloc include/linux/slab.h:720 [inline] tomoyo_print_bprm security/tomoyo/audit.c:26 [inline] tomoyo_init_log+0x1081/0x1fb0 security/tomoyo/audit.c:264 tomoyo_supervisor+0x316/0xfb0 security/tomoyo/common.c:2089 tomoyo_audit_env_log security/tomoyo/environ.c:36 [inline] tomoyo_env_perm+0x131/0x1f0 security/tomoyo/environ.c:63 tomoyo_environ security/tomoyo/domain.c:672 [inline] tomoyo_find_next_domain+0xf49/0x1700 security/tomoyo/domain.c:878 tomoyo_bprm_check_security+0xd4/0x100 security/tomoyo/tomoyo.c:101 security_bprm_check+0x2a/0x80 security/security.c:1103 search_binary_handler fs/exec.c:1727 [inline] exec_binprm fs/exec.c:1781 [inline] bprm_execve+0x75e/0x11b0 fs/exec.c:1856 do_execveat_common+0x44f/0x620 fs/exec.c:1964 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1136 [inline] free_unref_page_prepare+0x7bd/0x8e0 mm/page_alloc.c:2312 free_unref_page+0x37/0x3c0 mm/page_alloc.c:2405 discard_slab mm/slub.c:2116 [inline] __unfreeze_partials+0x1b1/0x200 mm/slub.c:2655 put_cpu_partial+0xdc/0x120 mm/slub.c:2731 __slab_free+0x26f/0x330 mm/slub.c:3679 qlist_free_all+0x22/0x70 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x15b/0x180 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x67/0x3d0 mm/slab.h:762 slab_alloc_node mm/slub.c:3478 [inline] __kmem_cache_alloc_node+0x141/0x260 mm/slub.c:3517 kmalloc_trace+0x2a/0xc0 mm/slab_common.c:1114 kmalloc include/linux/slab.h:599 [inline] tomoyo_print_header security/tomoyo/audit.c:156 [inline] tomoyo_init_log+0x1d2/0x1fb0 security/tomoyo/audit.c:255 tomoyo_supervisor+0x316/0xfb0 security/tomoyo/common.c:2089 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline] tomoyo_path_permission security/tomoyo/file.c:587 [inline] tomoyo_check_open_permission+0x3f1/0x920 security/tomoyo/file.c:777 security_file_open+0x2a/0x90 security/security.c:2836 do_dentry_open+0x2e6/0x1030 fs/open.c:916 Memory state around the buggy address: ffff888179485f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888179485f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888179486000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888179486080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888179486100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================